Journal article
Film-Based Sensors: Fundamental Impact of Film Structure
ECS transactions, Vol.19(6), pp.331-336
12/18/2019
DOI: 10.1149/1.3118569
Abstract
Sensors embodied in inert films on electrodes establish selectivity and sensitivity for an electroactive analyte extracted from solution. Typically, analytes are assayed on short voltammetric time scales to confine analyte diffusion lengths to the film. But measurements made on longer time scales can capitalize on film structure to match voltammetric wave shape to measurement methodology (e.g., derivative and steady state methods). Cyclic voltammetric wave shapes that range from Gaussian waves of thin layers through avian shapes established by semi-infinite linear diffusion to sigmoids of steady state transport are accessed by tailoring film structure. Three film structures are considered: uniform, graded, and bilayer. The role of relative flux in dictating cyclic voltammetric response as diffusion length exceeds film thickness is described.
Details
- Title: Subtitle
- Film-Based Sensors: Fundamental Impact of Film Structure
- Creators
- Chaminda HettigeJohna Leddy
- Resource Type
- Journal article
- Publication Details
- ECS transactions, Vol.19(6), pp.331-336
- DOI
- 10.1149/1.3118569
- ISSN
- 1938-6737
- eISSN
- 1938-6737
- Language
- English
- Date published
- 12/18/2019
- Academic Unit
- Chemistry
- Record Identifier
- 9983985871502771
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